to put one of your arms, fingers, or legs over the top of the other

交叉雙臂/手指/雙腿

She sat down and crossed her legs.

她坐下蹺起了二郎腿。

Padma was sitting with her arms and legs crossed, one foot jiggling in time to the music.

帕德瑪交叉著雙臂，蹺著二郎腿坐著，一只腿隨著音樂的節(jié)拍抖動(dòng)著。

Cross one’s fingers

to hope that things will happen in the way that you want them to

祈求好運(yùn)

She has her exam this morning so cross your fingers.

今天上午她要考試，祝她好運(yùn)吧